<template>
  <div class="login_container">
    <div class="login_box">
      <div class="avatar_box">
        <img src="../assets/01.jpg" alt="">
      </div>
      <el-form ref="loginFormRef" :model="loginForm" :rules="loginFormRules" label-width="0px" class="login_form">
                <!-- 用户名区域 -->
                <el-form-item prop="username">
                    <el-input v-model="loginForm.username" prefix-icon="iconfont icon-user"></el-input>
                </el-form-item>
                <!-- 密码 -->
                <el-form-item prop="password">
                    <el-input v-model="loginForm.password" prefix-icon="iconfont icon-3702mima" type="password"></el-input>
                </el-form-item>
                <!-- 按钮区域 -->
                <el-form-item class="btns">
                    <el-button type="primary" @click="login">登录</el-button>
                    <el-button type="info" @click="resetLoginForm">重置</el-button>
                </el-form-item>
            </el-form>
    </div>
  </div>
</template>

<script>
export default {
  data() {
    return {
      loginForm:{
        username:'admin',
        password:'123456'
      },
      loginFormRules:{
        username:[
          { required: true, message: '请输入登录名称', trigger: 'blur' },
          { min: 3, max: 10, message: '长度需要在 3 到 10 个字符之间', trigger: 'blur' }
        ],
        password:[
          { required: true, message: '请输入登录密码', trigger: 'blur' },
          { min: 6, max: 15, message: '长度需要在6到15个字符之间', trigger: 'blur' }
        ]
      }
    }
  },
  methods: {
    resetLoginForm(){
      this.$refs.loginFormRef.resetFields()
    },
    login(){
        this.$router.push('/home')
      this.$refs.loginFormRef.validate(async valid => {
        if(!valid) return;
        // 第一个参数是请求地址，第二个是请求绑定对象即请求参数
        const {data:res} = await this.$http.post("login", this.loginForm)
        if(res.meta.status !== 200) return this.$message.error('登录失败！')
        this.$message.success('登录成功！');
        
        // 必须将登陆成功之后的token保存到客户端的sessionStorage中，因为localStorage他是持久化的存储。我们要保证他在该页面时候带token的时候才能访问其他的接口，相当于一个令牌，没令牌什么也不能干
        window.sessionStorage.setItem('token', res.data.token);

        
      })
    }
  },
}
</script>

<style lang="less" scoped>
.login_container{
  position: relative;
  background: url(https://cdn.jsdelivr.net/gh/WaterChen520/Drawingbed/img/20210601103918.jpg) no-repeat fixed center;
  height: 100%;
}
.login_box{
  height: 300px;
  width: 450px;
  position: absolute;
  background-color: #fff;
  border-radius: 3px;
  left: 50%;
  top: 50%;
  transform:translate(-50%,-50%) ;
}
.avatar_box{
            height: 130px;
            width: 130px;
            border: 1px solid #eee;
            border-radius: 50%;
            padding: 10px;
            box-shadow: 0 0 10px #ddd;
            position: absolute;
            left: 50%;
            transform: translate(-50%, -50%);
            background-color: #fff;
            img{
                width: 100%;
                height: 100%;
                border-radius: 50%;
                background-color: #eee;
            }
        }
.login_form{
  position: absolute;
  bottom: 0;
  width: 100%;
  padding: 0 20px;
  box-sizing: border-box;
}
.btns{
  display: flex;
  justify-content: flex-end;
}
</style>